[Peter Cook]

Hi Chris, I assume that you are asking about II/StG1 officers

These are all from Doug's Luftwaffe Officer Career Summaries, which has more details:
Hauptmann Anton Keil – 09.07.40 Hptm., appt Kdr. II./St.G. 1 (to 29.08.41)
Oberleutnant Karl Schrepfer – 1940 Techn.Offz. II./St.G. 1
Oberleutnant Robert-Georg Freiherr von Malapert-Neufville – 09.39 Staka [4 staffel?] in II./St.G. 1.
Oberleutnant Joachim Rieger – 01.07.40 appt Staka 5./St.G. 1.
Hauptmann Johann Zemsky – 01.09.40 promo to Hptm. and appt Staka 6./St.G. 1.

Peter